Carry flag macros for C
Материал из fidoman.ru
Macros of inline functions for integer addition and subtracion with respect of carry flag
bool cadd(lvalue, rvalue1, rvalue2) // rvalue1+rvalue2 -> lvalue, returns true if there was carry
bool csub(lvalue, rvalue1, rvalue2) // rvalue1-rvalue2 -> lvalue, returns true if there was borrow
bool cadc(lvalue, rvalue1, rvalue2, rvalue_c) // rvalue1+rvalue2+c -> lvalue, returns true if there was carry
bool csbb(lvalue, rvalue1, rvalue2, rvalue_b) // rvalue1-rvalue2-b -> lvalue, returns true if there was borrow
And also for shift operations
bool rlc // rotate through carry
bool rrc
bool shl // shift with outmove bit to carry
bool shr
bool rol // rolling with outmove (duplicate bit to carry and to bit on side from which bits are moved)
bool ror